(this post contains as the same as my preceding post on Grub rescue problem after installing Ubuntu 12.04 LTS since I've post it on the wrong place) Thanks God I found this page. I'm a newby from Indonesia, and I have a laptop with 2 OSes (7 and Precise) installed. I have installed Ubuntu 12.04 manually by replacing Blankon 4.0's (an Ubuntu-based Indonesian distro) partition. I made /boot mountpoint and then chose it as the place for bootloading. As the result, I've been experiencing error 15 until now, and I have to boot my laptop from Paragon rescue kit every time I want to use it. Is there any way to solve the problem? Terima kasih (Thanks)